The following reaction was performed in a sealed vessel at 727C : H2(g)+I2(g)2HI(g) Initially, only H2 and I2 were present at concentrations of [H2]=3.80M and [I2]=2.50M. The equilibrium concentration of I2 is 0.0100M. What is the equilibrium constant, Kc, for the reaction at this temperature? Express your answer numerically